FORD EXPLORER STARTER PROBLEM

2000 Ford Explorer • 110,000 miles

2000 EXPLORER INTERMITANTLY WONT CRANK OVER. STARTS FINE IN THE MORNING. DRIVE 5 MILES AND WHEN YOUR TRY TO START AGAIN THERE IS NOTHING. REPLACED BATTERY, STARTER, IGNITION, STARTER RELAY, NEUTRAL SAFETY. THE REMOTE STARTER STOPPED WORKING AT THE SAME TIME. MECHANIC NOW SAYS IT NEEDS A GEM BUT I HAD NOT HEARD THE GEM KEEPS IT FROM TURNING OVER SOMETIMES. ITS A 4, 0 SOCH 4X4. ALSO NOTICED WHEN IT WONT START THE HEADLIGHTS GO OFF COMPLETLY. THAT USED TO TELL US THE STARTER WAS GETTING POWER BUT WHO KNOWS ON TODAYS CARS.

Ill look but I cant see any relationship to it since it starts fine in the morning of after letting it sit for a few minutes and once it cools off it starts fine. If the ground was bad why would it start fine again without it touching or moving the car?

PCM quick test basicly visual checks and scan PCM for codes so if no check engine light on check BJB for battery connection tightnes
Check G104 lose or corroided grounds will have less resistence when vehicle not running for some time as it runs and current flows through connection it heats up and resistence increases to a point where component does not function.
Does this help?